محرك اختيار مدى ناقل الحركة معيب

The motor that moves a shift-by-wire transmission between park, reverse, neutral and drive — the muscle that replaced the selector cable. When it fails the car does not lose a gear, it loses the ability to change which gear: refused range changes, a selector display that disagrees with the gearbox, or a park it cannot engage or release.

Prove the mechanism before the motor. A seized or obstructed park mechanism raises the current every shift costs until the motor's own protection trips, so the motor's circuit codes are often the messenger for a mechanical problem downstream of it.